This picture shows what to do and also shows what spring to use and what not to use.

The lower heavy spring is the one needed. Guys I bought these springs years ago at Home Depot is a verity pack of springs. Finding the right spring rate is key. Also The aluminum Diff housing is key as it will no warp over time from the pressure that is on the gears that put the pressure on the housing. I'm not saying it will not work I just don't know because I haven't tried it. I'm going to though. Also when you cut the spring I use a dremel cut wheel. Feather the cut edge so that it is not going to bind against the gear. You get this right and you will not need lockerss hardly ever. Good luck!

Yes... your seeing this right. That is JB Weld black not the gray. This works well and it takes the shock out of the gears well.